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Financing Activities - Short-term Debt (Details) - Commercial Paper [Member] - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Short-term Debt [Line Items]      
Capacity $ 2,775    
Commercial Paper Issuances 985 $ 69  
Unused Capacity 1,790    
PPL Capital Funding [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate     0.84%
Capacity 1,350    
Commercial Paper Issuances 347 0  
Unused Capacity 1,003    
PPL Electric [Member]      
Short-term Debt [Line Items]      
Capacity 650    
Commercial Paper Issuances 0 $ 0  
Unused Capacity $ 650    
LGE [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate 0.72% 0.31%  
Capacity $ 425    
Commercial Paper Issuances 353 $ 69  
Unused Capacity $ 72    
KU [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate 0.78%    
Capacity $ 350    
Commercial Paper Issuances 285 0  
Unused Capacity 65    
PPL Electric Utilities Corp [Member]      
Short-term Debt [Line Items]      
Capacity 650    
Commercial Paper Issuances 0 $ 0  
Unused Capacity $ 650    
Louisville Gas And Electric Co [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate 0.72% 0.31%  
Capacity $ 425    
Commercial Paper Issuances 353 $ 69  
Unused Capacity $ 72    
Kentucky Utilities Co [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate 0.78%    
Capacity $ 350    
Commercial Paper Issuances 285 $ 0  
Unused Capacity $ 65